Adapter



FIG. 1 is a left side elevation view of an adapter; showing my new design;

FIG. 2 is a top, front and right side perspective view thereof;

FIG. 3 is a front elevation view thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a rear elevation view thereof;

FIG. 6 is a bottom plan view thereof; and,

FIG. 7 is a bottom, front and left side perspective view thereof. 

The ornamental design for an adapter, as shown and described. 